Home / 2,274.42-3,138.12-1,389.90

Finding the Fourth Proportional to 2,274.42, 3,138.12 and 1,389.90

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Solution

The fourth proportional to 2,274.42, 3,138.12 and 1,389.90 is: 1,917.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.42 : 3,138.12 = 1,389.90 : x
  2. Step 2: Convert to fraction form
    2,274.42/3,138.12 = 1,389.90/x
  3. Step 3: Cross multiply
    2,274.42x = 3,138.12 × 1,389.90
  4. Step 4: Simplify right side
    2,274.42x = 4,361,672.99
  5. Step 5: Solve for x
    x = 4,361,672.99/2,274.42
  6. Step 6: Final answer
    x = 1,917.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.